001    /**
002     * Copyright 2005-2013 The Kuali Foundation
003     *
004     * Licensed under the Educational Community License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.opensource.org/licenses/ecl2.php
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    package org.kuali.rice.ksb.security;
017    
018    import java.security.Signature;
019    import java.security.cert.Certificate;
020    
021    import org.apache.commons.httpclient.HttpMethod;
022    import org.apache.commons.lang.StringUtils;
023    import org.kuali.rice.ksb.util.KSBConstants;
024    
025    /**
026     * A DigitalSigner implementation which places the alias and digital signature into the request
027     * headers of the commons HttpClient's HttpMethod.
028     * 
029     * @author Kuali Rice Team (rice.collab@kuali.org)
030     */
031    public class HttpClientHeaderDigitalSigner extends AbstractDigitalSigner {
032    
033            private HttpMethod method;
034            private String alias;
035            private Certificate certificate;
036            
037        public HttpClientHeaderDigitalSigner(Signature signature, HttpMethod method, String alias) {
038            super(signature);
039            this.method = method;
040            this.alias = alias;
041        }
042        
043        public HttpClientHeaderDigitalSigner(Signature signature, HttpMethod method, String alias, Certificate certificate) {
044            this(signature, method, alias);
045            this.certificate = certificate;
046        }
047        
048        public HttpClientHeaderDigitalSigner(Signature signature, HttpMethod method, Certificate certificate) {
049            super(signature);
050            this.method = method;
051            this.certificate = certificate;
052        }
053        
054            public void sign() throws Exception {
055            if (StringUtils.isNotBlank(this.alias) ) {
056                this.method.addRequestHeader(KSBConstants.KEYSTORE_ALIAS_HEADER, this.alias);
057            }
058                if (this.certificate != null) {
059                    this.method.addRequestHeader(KSBConstants.KEYSTORE_CERTIFICATE_HEADER, getEncodedCertificate(this.certificate));
060                }
061                this.method.addRequestHeader(KSBConstants.DIGITAL_SIGNATURE_HEADER, getEncodedSignature());
062            }
063    
064    }